/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University. All rights reserved.
 * 
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license; 2) All redistributions in binary form
 * must reproduce the above copyright notice, this list of conditions and the
 * disclaimer listed in this license in the documentation and/or other materials
 * provided with the distribution; 3) Any documentation included with all
 * redistributions must include the following acknowledgement:
 * 
 * "This product includes software developed by the Community Grids Lab. For
 * further information contact the Community Grids Lab at
 * http://communitygrids.iu.edu/."
 * 
 * Alternatively, this acknowledgement may appear in the software itself, and
 * wherever such third-party acknowledgments normally appear.
 * 
 * 4) The name Indiana University or Community Grids Lab or NaradaBrokering,
 * shall not be used to endorse or promote products derived from this software
 * without prior written permission from Indiana University. For written
 * permission, please contact the Advanced Research and Technology Institute
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202. 5) Products
 * derived from this software may not be called NaradaBrokering, nor may Indiana
 * University or Community Grids Lab or NaradaBrokering appear in their name,
 * without prior written permission of ARTI.
 * 
 * 
 * Indiana University provides no reassurances that the source code provided
 * does not infringe the patent or any other intellectual property rights of any
 * other entity. Indiana University disclaims any liability to any recipient for
 * claims brought by any other entity based on infringement of intellectual
 * property rights or otherwise.
 * 
 * LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO
 * WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 * NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF
 * INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS.
 * INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS",
 * "VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.
 * LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR
 * ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION
 * GENERATED USING SOFTWARE.
 */
package cgl.narada.transport.udp;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Vector;

import cgl.narada.transport.TransportDebugFlags;
import cgl.narada.transport.TransportException;

/**
 * The sender thread involved in UDP communications. Send messages to the
 * specified InetAddress and port specified during initializations.
 * 
 * @author Shrideep Pallickara and modified by Beytullah Yildiz $Revision$
 *         $Date$
 */

public class UDPSenderThread implements TransportDebugFlags {
   private InetAddress ia;

   private int port;

   private DatagramSocket socket;

   private UDPLink udpLink;

   private int messageTracker = 0;

   private String moduleName = "UDPSenderThread: ";

   private UDPBigPackageHandler udpbigpackagehandler;

   private DatagramPacket datagramPacket = null;

   public UDPSenderThread(DatagramSocket socket, InetAddress ia, int port,
         UDPLink udpLink) {
      this.ia = ia;
      this.port = port;
      this.socket = socket;
      this.udpLink = udpLink;

      udpbigpackagehandler = new UDPBigPackageHandler();
      udpbigpackagehandler.initSender(UDPSenderThread_Debug);

   }

   public void sendData(byte[] data, String dataType) throws TransportException {
      /* NBNI */
      sendData(data);
   }

   public synchronized void sendData(byte[] data) throws TransportException {
      try {

         if (data.length >= 65507) {
            if (UDPSenderThread_Debug) {
               System.out.println("Data is bigger than 64KB");
            }

            Vector pvector = udpbigpackagehandler.createSmallPackVector(data);

            while (true) {

               if (pvector.size() > 0) {
                  byte[] sentarray = udpbigpackagehandler
                                                         .composePackage(pvector);
                  DatagramPacket dp = new DatagramPacket(sentarray,
                                                         sentarray.length, ia,
                                                         port);
                  socket.send(dp);
               } else {
                  break; // while loop break
               }
            }/* end while */
            return;
         }

         if (UDPSenderThread_Debug) {
            System.out.println("Data is smaller than 64KB");
         }

         DatagramPacket dp = new DatagramPacket(data, data.length, ia, port);
         socket.send(dp);
         dp = null;

         if (UDPSenderThread_Debug) {
            System.out.println(moduleName + "Sent data to " + ia + ":" + port);
            System.out.println(moduleName + "Sent "
                               + new String(data, 0, data.length));
         }

      } catch (IOException ioe) {
         throw new TransportException(moduleName + ioe);
      }
   }

   public void run() {

   }

}
